Steam iron



FIG. 1 is a perspective view of a steam iron showing our new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a right view thereof;

FIG. 7 is an enlarged top view thereof; and,

FIG. 8 is an enlarged bottom view thereof.

The broken lines shown on the drawings depict portions of the steam iron that form no part of the claimed design. 

CLAIM The ornamental design for a steam iron, as shown and described. 